Recent advances in language and speaker recognition: Compensation methods, the Joint Factor Analysis
L2F and TALP –
A considerable amount of promising methods for language and speaker recognition have been proposed in the most recent NIST language (LRE) and speaker (SRE) recognition evaluation workshops. In this talk we will focus on the problem of compensation to several sources of variability such as speaker or session and we will introduce the Joint Factor Analysis (JFA) modeling. We will give an explanation of the JFA model and a brief account of the algorithms needed to carry out a JFA of speakers and session variability in a training set in which each speaker is recorded over many different channels.
JFA is a model of speaker and session variability in Gaussian mixture models (GMMs) and it is capable of performing at least as well as fusions of multiple systems of other types. The JFA technique makes use of the super-vector form for modeling. That assumes that a speaker- and channel-dependent supervector (M) can be decomposed into a sum of two supervectors statistically independent, a speaker supervector (s) and a channel supervector (c). In addittion, JFA assumes that all speaker dependent supervectors are contained in the affine space defined by the eigenvoices, the directions of speaker variability, which generate the “speaker space”. On another front, the channel variability is confined in the “channel space” defined by the eigenchannels.
Date: 2010-Jan-29 Time: 15:00:00 Room: 336
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Workshop “Metabolism and mathematical models: Two for a tango” – 2nd Edition
Title: Workshop Metabolism and mathematical models: Two for a tango – 2nd Edition
Dates: October 25-26, 2022
Location: This workshop will be held in a virtual way
The topic of this workshop is metabolism in general, with a special focus, although not exclusive, on parasitology. Besides an exploration of the biological, biochemical and biomedical aspects, the workshop will also aim at presenting some of the mathematical modelling, algorithmic theory and software development that have become crucial to explore such aspects.
This workshop is being organised in the context of two projects, both with the Inria European Team Erable. One of the projects involves a partnership with the University of São Paulo (USP), in São Paulo, Brazil, more specifically the Institute of Mathematics and Statistics (IME) and the Institute of Biomedical Sciences – Inria Associated Team Capoeira – and the other involves the Inesc-ID/IST in Portugal, ETH in Zürich and EMBL in Heidelberg – H2020 Twinning Project Olissipo.
The workshop is open to all members of these two projects but also, importantly, to the community in general.
The program and more details are available here.